All Elements for Life Found on Saturn's Icy Moon Enceladus

2023-06-20

00:00 / 00:00
复读宝 RABC v8.0beta 复读机按钮使用说明
播放/暂停
停止
播放时:倒退3秒/复读时:回退AB段
播放时:快进3秒/复读时:前进AB段
拖动:改变速度/点击:恢复正常速度1.0
拖动改变复读暂停时间
点击:复读最近5秒/拖动:改变复读次数
设置A点
设置B点
取消复读并清除AB点
播放一行
停止播放
后退一行
前进一行
复读一行
复读多行
变速复读一行
变速复读多行
LRC
TXT
大字
小字
滚动
全页
1
  • An international team of scientists says it has found high levels of phosphorus in ice from Saturn's moon Enceladus.
  • 2
  • Phosphorus is a necessary element for many biological processes on Earth.
  • 3
  • The researchers said the ice crystals shot out from an ocean beneath the moon's surface.
  • 4
  • The discovery came from data collected by NASA's Cassini spacecraft.
  • 5
  • Cassini collected the data during its 13-year exploration of the huge planet, its rings, and its moons from 2004 to 2017.
  • 6
  • Cassini was the first spacecraft to orbit Saturn.
  • 7
  • The German-led team published their findings in Nature, a science magazine.
  • 8
  • NASA's Jet Propulsion Laboratory (JPL) in the western U.S. state of California also announced the findings.
  • 9
  • JPL designed and built the Cassini spacecraft.
  • 10
  • Earlier, the same team confirmed that Enceladus' ice grains are rich in minerals and complex organic compounds.
  • 11
  • The team said the ice includes the necessary elements to create amino acids, which are important molecular structures for life.
  • 12
  • Phosphorus is the least common of the six chemical elements considered necessary to all living things.
  • 13
  • The others are carbon, oxygen, hydrogen, nitrogen, and sulfur.
  • 14
  • Now, scientists have found them all on Enceladus.
  • 15
  • "It's the first time this essential element has been discovered in an ocean beyond Earth," said the study's lead writer, Frank Postberg.
  • 16
  • He is a planetary scientist at the Free University in Berlin in Germany.
  • 17
  • Phosphorus is necessary for DNA, the genetic instructions in cells.
  • 18
  • It is also an important part of energy formation and transportation in life on Earth.
  • 19
  • The researchers studied measurements taken by Cassini as it passed through salt-rich ice grains released into space by geysers found on the southern part of the moon.
  • 20
  • The geysers were erupting from the ice-covered ocean beneath the surface of Enceladus.
  • 21
  • The substances are the same material that creates one of Saturn's rings, called the "E" ring.
  • 22
  • The E ring can be found outside the planet's brighter main rings.
  • 23
  • Cassini discovered the ice-covered ocean.
  • 24
  • Since then, Enceladus has been a favorable target in the search for places in our solar system that could support life.
  • 25
  • Enceladus is about one-seventh the size of Earth's moon and the sixth largest among Saturn's 146 known natural satellites.
  • 26
  • Jupiter's moon Europa is also believed to have an ocean beneath its icy surface.
  • 27
  • Computer modeling by the study's co-writers in Europe and Japan shows that phosphorus exists in concentrations at least 100 times higher than in Earth's oceans.
  • 28
  • Christopher Glein is a planetary scientist at Southwest Research Institute in San Antonio, Texas.
  • 29
  • He took part in the research.
  • 30
  • He said the discovery was important.
  • 31
  • Glein said there could be enough phosphorus to support life in Enceladus' ocean.
  • 32
  • The scientists noted that finding phosphorus, complex organic compounds, water, and other things is evidence that Enceladus could possibly support life.
  • 33
  • Life, either past or present, has not been confirmed anywhere beyond Earth.
  • 34
  • "Whether life could have originated in Enceladus' ocean remains an open question," Glein added.
  • 35
  • I'm Gregory Stachel.
  • 1
  • An international team of scientists says it has found high levels of phosphorus in ice from Saturn's moon Enceladus.
  • 2
  • Phosphorus is a necessary element for many biological processes on Earth.
  • 3
  • The researchers said the ice crystals shot out from an ocean beneath the moon's surface.
  • 4
  • The discovery came from data collected by NASA's Cassini spacecraft. Cassini collected the data during its 13-year exploration of the huge planet, its rings, and its moons from 2004 to 2017. Cassini was the first spacecraft to orbit Saturn.
  • 5
  • The German-led team published their findings in Nature, a science magazine. NASA's Jet Propulsion Laboratory (JPL) in the western U.S. state of California also announced the findings. JPL designed and built the Cassini spacecraft.
  • 6
  • Earlier, the same team confirmed that Enceladus' ice grains are rich in minerals and complex organic compounds. The team said the ice includes the necessary elements to create amino acids, which are important molecular structures for life.
  • 7
  • Phosphorus is the least common of the six chemical elements considered necessary to all living things. The others are carbon, oxygen, hydrogen, nitrogen, and sulfur. Now, scientists have found them all on Enceladus.
  • 8
  • "It's the first time this essential element has been discovered in an ocean beyond Earth," said the study's lead writer, Frank Postberg. He is a planetary scientist at the Free University in Berlin in Germany.
  • 9
  • Phosphorus is necessary for DNA, the genetic instructions in cells. It is also an important part of energy formation and transportation in life on Earth.
  • 10
  • The researchers studied measurements taken by Cassini as it passed through salt-rich ice grains released into space by geysers found on the southern part of the moon. The geysers were erupting from the ice-covered ocean beneath the surface of Enceladus.
  • 11
  • The substances are the same material that creates one of Saturn's rings, called the "E" ring. The E ring can be found outside the planet's brighter main rings.
  • 12
  • Cassini discovered the ice-covered ocean. Since then, Enceladus has been a favorable target in the search for places in our solar system that could support life. Enceladus is about one-seventh the size of Earth's moon and the sixth largest among Saturn's 146 known natural satellites.
  • 13
  • Jupiter's moon Europa is also believed to have an ocean beneath its icy surface.
  • 14
  • Computer modeling by the study's co-writers in Europe and Japan shows that phosphorus exists in concentrations at least 100 times higher than in Earth's oceans.
  • 15
  • Christopher Glein is a planetary scientist at Southwest Research Institute in San Antonio, Texas. He took part in the research. He said the discovery was important. Glein said there could be enough phosphorus to support life in Enceladus' ocean.
  • 16
  • The scientists noted that finding phosphorus, complex organic compounds, water, and other things is evidence that Enceladus could possibly support life. Life, either past or present, has not been confirmed anywhere beyond Earth.
  • 17
  • "Whether life could have originated in Enceladus' ocean remains an open question," Glein added.
  • 18
  • I'm Gregory Stachel.
  • 19
  • Steve Gorman reported this story for Reuters. Gregory Stachel adapted it for VOA Learning English.
  • 20
  • __________________________________________________________________
  • 21
  • Words in This Story
  • 22
  • spacecraft - n. a vehicle that is used for travel in outer space
  • 23
  • crystal -n. a form of a mineral in which the molecules are ordered in a regular way
  • 24
  • rings - n. something that is shaped like a circle
  • 25
  • grain -n. any very small, rounded object
  • 26
  • organic - adj. of, relating to, substances that contain the element carbon and which are necessary for life
  • 27
  • essential -adj. extremely important and necessary
  • 28
  • geyser - n. a hole in the ground that shoots out hot water and steam
  • 29
  • erupt - v. to send out rocks, ash, or lava in a sudden explosion
  • 30
  • concentration - n. the amount of an ingredient in a mixture
  • 31
  • originate - v. to begin to exist
  • 32
  • _______________________________________________________________
  • 33
  • What do you think of this story?
  • 34
  • We want to hear from you. We have a new comment system. Here is how it works:
  • 35
  • Each time you return to comment on the Learning English site, you can use your account and see your comments and replies to them. Our comment policy is here.